Attachment for sewing-machines



N. P. DUNCAN. 'ATTAGHMENT PoR SEWING MAGHIN'BS.

'(NoModel.)

` No. 600,111. Patented Mar. 1.1898.

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UNijTED STATES PATENT OFFICE.

NATHANIEL P. DUNCAN, OF HANFORD, CALIFORNIA.

ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 600,1 1 1, dated March1, 1898. Appncflnon nea Juiyzg, 1897. saranno. 646,363. (roma-.1.)

To all whom, t 17mg/ concern:

Be it known that I, NATHANIEL P. DUNCAN, a citizen of the United States,residing at Hanford, in the county of `Kin gs and State of Oalifornia,have invented certain new and useful Improvements in Attachments forSewing- Machines; and I do hereby declare the following to be a full,clear, and exact description of said invention, such as will enableothers skilled in the art to which it most nearly appertains to make,use, and practice the same. v

This invention relates to improvements in hand-operated drivingattachments foil sewing-machines; and it consists in the novelarrangement and construction of parts whereby the driving attachment issubstituted for the foot-treadle attachment.

In the drawings, Figure 1 isa side elevation of the legs anddriving-wheel of a sewing-machine having my attachment applied thereto.Fig. 2 is a front elevation of the legs of a sewing-machine on the oneside, together with the driving-wheel and my attachment applied thereto.Fig. 3 isa side view in detail of the hand-operated lever detachedfromthe machine. Fig. 4 is 'a detail view,in side elevation, of the hanger,by means of which the lever is attached to the leg of a sewingmachine.Fig. 5 is adetail view of an alternative form of hanger for the lever.Fig. 6 is a detail view of the screw-threaded conebearing, by means ofwhich the treadle is mounted on a machine and showing the cone endprovided for mounting the lever. Fig. 7 is a'detail view of the pitmanconnection,

- showing the construction by means of which it is adjusted to thevarious sizes of perforation in different pitmen.

The style of sewing-machines to which my attachment is preferablyapplied is to what is known as the Singer sewing-machine. In this styleof machine the/treadle is mounted in cone-bearings between the one sideof the machine removed from the driving-Wheel and a bracketed extensionwhich is thrown out from the other side of the machine and forms a partof the cross-brace. To apply my attachment to this style of machine thescrew that carries the cone for the bearing of the treadle on the sidenext the bracket before mentioned is provided with an outward-extendingcone A'. In line with the cone A and extending toward the same is ascrew A2, provided with the cone A3 and also with the lock-nut A4. Thisscrew A2 is mounted in the extension A5, suitable thread being providedin the end thereof. The extension A5 is swung on the side of the frameor leg X. This is" accomplished by removing the ordinary bolt providedfor the attachment to the cross-brace X' to the frame X and substitutingtherefor a bolt A6 of greaterlength. The bolt A6 is secured rigidly inposition by means of the nut AT and is lready to receive the extensionA5, the upper end of which is provided with a perforation adapted toextend over the inner end of the bolt A6 and to rest against the nut A7.When placed over the end of the bolt A6, the extension A5 is securedrigidly in position by setting up the nut A8 firmly against it.

The lever B is formed to the shape shown in Fig. 3 of the drawings, thecurve B being given'to avoid the guard on the iiy-wheel of the machine.It is provided on the lower extension with the boss B2, extending toeither side therefrom. The boss is provided with inverted conicaldepressions to receive the cones A A3. In mounting the lever B on themachine thescrew A2 is withdrawn until the whole boss B2 will passbetween the ends of the cones. The conical depression on the side nextthe cone A is then adjusted and the screw A2 driven forward into theconical depression on its side, and when rmly in position the lock-nutA4 is driven against the eX- tension A5 tightly. The cones AA3 areformed of long and sharply-tapered extensions, so that when the lever ismounted between the same it will be held firmly against lateralmovement.

In applying this attachment to the sewingmachine the idea is tosubstitute it for the usual foot-power driving-gear, and with this ideain view the pitman X3 is disconnected from the foot-treadle and into thehole or connecting-aperture left the pin B3 is extended and secured.This arrangement of the parts having been attained, the sewing-machinemay be operated by throwing thenpper end of the lever B backward andforward, which, causing the lever to swing on the pivot formed by thecones A A3, produces the reciprocating action of the pitman X3 andcauses the iiy-wheel ofthe machine to rotate.

IOO

The upper end of the lever is provided with a handle B4, which ispivotally connected to the upper end of the lever B, as shown in Figs. 1and 3. By means of the pivotal action on the handle B4 to the lever Bthe forward and backward movement of the lever may be readilyaccomplished by the operative withoutfollowing the arch of the movementof the lever about its pivot; also, by thus connecting the handle B4 tothe lever the hand of the operative may be maintained at various angleswith reference to the end of the lever, and by thus alternating theposition of the hand it may be rested.

To prevent the handle B4 swinging against the guard of the fly-wheel orinto an inconvenient position, it is provided with an extension B5, sothat the handle will not pass the lever when released by the operator.

In the form of the mounting shown in Fig. 5 of drawings there isprovided for the style of machines wherein the treadle is mounted 011 across-rod that extends between the sides or legs of the machine. Thisalternation calls for the use of clips C' C', which are mounted on thecross-bar X4 and set in position by the set-screws C. `The clips C arein every other respect similar to the extension A5 and are provided intheir ends (which in this form are extended upward instead of downward)with the screws A2, having the cones A3, which are seated in thedepressions provided in the boss B2 of the lever B. Vhen the machine isprovided with this mounting for the lever, the connection and operationof the lever in its relation to the pitm an X3 are the same as abovedescribed.

Having thus described this invention, it is claimed- 1. An attachmentforsewing-machines,con sisting in the combination of a lever pivotallyconnected to the pitman of the driving-wheel of the machine andfulcrumed on the frame of the machine and extending above the bearing ofthe said driving-wheel; with afulcrumbearing for the said lever mountedon the said frame and adapted to be separated laterally to permit therapid adjustment and removal ofthe lever; and an attaching deviceadapted to connect the lower end of the said pitman and lever,substantially as described.

2. An attachmentfor sewing-machines conand recede the said side to andfrom the said' lever; and an attaching device adapted to connect thelower end of the said pitman and lever, substantially as described.

3. An attachment for sewing-machines consisti'n g in the combination ofa lever connected to the pitman of the driving-wheel and 'fulcrumed onthe frame of the machine and extended forward to above the bearing ofthe said drivin g-wheel; with pivotal bearings consisting of screw-boltshaving conical-shaped ends turned toward each other and adapted toextend into and be withdrawn from suitable sockets on each side of thesaid lever; brackets secured to the frame of the machine and havingthreaded perforations to receive the said screw-bolts and an attachingdevice adapted to connect the lower end of the said pitman and lever,substantially as described.

4. An attachment for sewing-machines consisting in the combination of alever pivotally connectedto the pitman of the driving-wheel andfulcrumed on the frame of the machine and extended to above the bearingof the said driving-wheel; fulcrumed bearings for the said leverconsisting in brackets secured to the frame of the machine and beingprovided with screw-bolts having conical-shaped ends and mounted inthreaded perforations in the said brackets to be advanced to andwithdrawn from suitable sockets on each side of the said lever; anelongated handle pivotally mounted on the upper extension of the saidlever and adapted to extend toward the front of the machine; and anattaching device adapted to connect the lower end of the said lever tothe said pitman, substantially as described.

In testimon'y whereof I have hereunto set my hand this 13th day of July,1897.

\ NATHANIEL I). DUNCAN.

Witnesses BALDWIN VALE, MAYNARD HARMs.

